EnergyExemplarButton_2048Nat Gas and Power sectors are on a path of convergence in terms of reliable electricity supply across the American mainland. Reliable electricity supply is key driver in the power sector with marginal cost power markets where firm vs non firm gas supply with bilateral contracts is the means for monetization and supply in gas market. Yet growth projections of gas demand are primarily driven by gas fired generation expansion in power sector to fill gap between potential coal retirements and intermittent renewables from public policy mandates. Modern day elegant solutions centre around world class co-optimization algorithms to understanding, planning, forecasting the coupling of nat gas and power sectors along with quantifying joint reliability responsibility for keeping the lights on. Co-optimizations facilitate least cost infrastructure developments between the sectors and enable simultaneous production cost minimizations of gas and electric markets.